STUFFED STANDING RIB ROAST

Steps:

• Make the stuffing: place the porcini in a small bowl and cover with boiling water. Soak for at least 45 minutes, or up to several hours, until soft. Lift porcini out of the liquid, drain on paper towels, chop and set aside. Strain the soaking liquid, leaving behind any grit in the bottom of the bowl, and set aside.
• Heat a large skillet over medium heat. Add sausages and cook for about 5 minutes, breaking the meat apart with a fork as it browns. Add mushrooms, shallots and garlic, cover, and cook for about 5 minutes more, stirring from time to time, until the vegetables are tender.
• Transfer the mixture to a large bowl. Stir in bread cubes, rosemary, spinach and egg and mix well. Moisten with about 1/4 cup reserved mushroom liquid. The stuffing should be slightly moist but not wet. Season to taste with salt and pepper and set aside, or refrigerate if not using immediately. (The stuffing is best made a day ahead and refrigerated, but don't stuff the meat ahead, as it can spoil.)
• Cook the meat: let the roast stand at room temperature for 4 hours before roasting. Heat the oven to 450 degrees, with a rack in the lower third of the oven.
• Using a long sharp knife, cut the roast between the bones and the meat so that the rack of ribs is almost severed from the meat, leaving about 3/4 inch of the meat attached to the bones. Place the roast on a flat surface so that you are looking down into the crevices between the bones and meat. Spread the stuffing into each crevice, using a rubber spatula to pack it in. (If you have extra stuffing, bake it in a buttered uncovered casserole dish for 30 minutes.) Tie the bones back in place with a couple of loops of butcher's twine to keep the stuffing inside.
• Combine the garlic, salt, pepper, rosemary, fennel seeds and oil in a small bowl. Generously rub the mixture over the top and sides of the roast and bones. Place a large V-shape roasting rack in a roasting pan and nestle the roast on the rack so that the bones are sticking straight up. Wrap the bone tips in aluminum foil to prevent burning.
• Roast for 20 minutes, then turn down the oven to 350 degrees and roast until the internal temperature is about 120 degrees. If you are not using a continuous-read thermometer, begin monitoring the internal temperature with an instant-read thermometer after 45 minutes, checking the temperature every 15 minutes at the thickest part of the roast. When the roast is done (usually 1 1/4 to 2 hours), set aside, covered loosely with aluminum foil, to rest for at least 20 minutes and up to 45 minutes before carving and serving. The temperature will rise 10 to 15 degrees as it rests.
• To carve and serve, remove the twine from the roast. Place the roast on a cutting board so that the bones are vertical. Sever the strip of meat attached to the bones and spoon the stuffing into a serving bowl. Set the bones aside, and turn the roast so the bone side lies flat. Cut the roast into 1/4- to 1/2-inch-thick slices and arrange in an overlapping row on a serving platter.
• Slice between the bones to separate them and add to the platter. Pour any carving juices over the meat and serve.